Lithium-based battery pack for a hand held power tool
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-010/44
H01M-010/46
H02J-007/00
H01M-002/10
H02J-007/02
H01M-006/42
H01M-010/052
출원번호
US-0948311
(2018-04-09)
등록번호
US-10218194
(2019-02-26)
발명자
/ 주소
Johnson, Todd W.
Grzybowski, Dennis J.
Kubale, Mark A.
Rosenbecker, Jay J.
Scheucher, Karl F.
Meyer, Gary D.
Zeiler, Jeffrey M.
Glasgow, Kevin L.
출원인 / 주소
MILWAUKEE ELECTRIC TOOL CORPORATION
대리인 / 주소
Michael Best & Friedrich LLP
인용정보
피인용 횟수 :
0인용 특허 :
84
초록▼
A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and
A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and be operable to supply power to operate the power tool. The method can include discharging one of the first cell and the second cell until the voltage of the one of the first cell and the second cell is substantially equal to the voltage of the other of the first cell and the second cell.
대표청구항▼
1. A battery pack comprising: a housing connectable to and supportable by a hand held power tool;a plurality of battery cells supported within the housing, the plurality of battery cells connected in a combined series-parallel configuration, each of the plurality of battery cells having a lithium-ba
1. A battery pack comprising: a housing connectable to and supportable by a hand held power tool;a plurality of battery cells supported within the housing, the plurality of battery cells connected in a combined series-parallel configuration, each of the plurality of battery cells having a lithium-based chemistry, each of the plurality of battery cells being cylindrical and having a cell diameter and a cell length, the cell length being at least about two times the cell diameter;first and second terminals for electrically connecting the battery pack to the hand held power tool; anda circuit configured to control a discharge of the plurality of battery cells to produce a discharge current from the plurality of battery cells, an average of the discharge current produced by the plurality of battery cells being greater than or equal to approximately 20 amps. 2. The battery pack of claim 1, wherein the lithium-based chemistry includes manganese. 3. The battery pack of claim 1, wherein the cell length is between about two and about 2.7 times the cell diameter. 4. The battery pack of claim 1, wherein the battery pack has an ampere-hour capacity of at least 3.0 ampere-hours. 5. The battery pack of claim 1, wherein the cell length is between about 60 mm and about 70 mm. 6. The battery pack of claim 1, wherein the cell length is about 65 mm. 7. The battery pack of claim 1, wherein the circuit is configured to control a field-effect transistor (“FET”) to control the discharge of the plurality of battery cells. 8. The battery pack of claim 7, wherein the FET is within the housing. 9. The battery pack of claim 1, wherein the circuit includes a microprocessor. 10. An electrical combination comprising: a battery pack for supplying power to a hand held power tool, the battery pack including a battery pack housing connectable to and supportable by the hand held power tool, anda plurality of battery cells supported within the battery pack housing, the plurality of battery cells connected in a combined series-parallel configuration, each of the plurality of battery cells having a lithium-based chemistry, each of the plurality of battery cells being cylindrical and having a cell diameter and a cell length, the cell length being at least about two times the cell diameter;first and second terminals for electrically connecting the battery pack and the hand held power tool; anda circuit configured to control a discharge of the plurality of battery cells to produce a discharge current from the plurality of battery cells and to supply the discharge current to the hand held power tool, an average of the discharge current produced by the plurality of battery cells being greater than or equal to approximately 20 amps. 11. The combination of claim 10, wherein the cell length is between about two and about 2.7 times the cell diameter. 12. The combination of claim 10, wherein the battery pack has an ampere-hour capacity of at least 3.0 ampere-hours. 13. The combination of claim 10, wherein the cell length is between about 60 mm and about 70 mm. 14. The combination of claim 10, wherein the cell length is about 65 mm. 15. The combination of claim 10, wherein the circuit is configured to control a field-effect transistor (“FET”) to control the discharge of the plurality of battery cells. 16. The combination of claim 15, wherein the FET is within the battery pack housing. 17. The combination of claim 10, wherein the circuit includes a microprocessor. 18. The combination of claim 17, wherein the microprocessor is within the battery pack housing. 19. The combination of claim 10, further comprising a hand held power tool. 20. A method of operating a battery pack, the method comprising: coupling a housing of the battery pack to a hand held power tool to support the battery pack on the hand held power tool, the battery pack including a plurality of battery cells supported within the housing, the plurality of battery cells being connected in a combined series-parallel configuration, each of the plurality of battery cells having a lithium-based chemistry, each of the plurality of battery cells being cylindrical and having a cell diameter and a cell length, the cell length being at least about two times the cell diameter, andfirst and second terminals for electrically connecting the battery pack to the hand held power tool; andcontrolling, with a circuit, a discharge of the plurality of battery cells to produce a discharge current from the plurality of battery cells, an average of the discharge current produced by the plurality of battery cells being greater than or equal to approximately 20 amps.
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